1,2,4-Trichlorobenzene
Yucaipa Valley Water District
1,2,4-Trichlorobenzene is an industrial solvent that can harm the adrenal glands and may increase the risk of cancer.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | ND | 10 | 0 | ND |
| 2015 | ND | 3 | 0 | ND |
| 2016 | ND | 21 | 0 | ND |
| 2017 | ND | 3 | 0 | ND |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 14 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 5 ppb
The EWG Health Guideline of 5 ppb for 1,2,4-trichlorobenzene was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against hormone disruption.
EPA Maximum Contaminant
Level (MCL) 70 ppb
The legal limit for 1,2,4-trichlorobenzene, established in 1992, was based on a toxicity study in laboratory animals conducted in 1981. This limit may not fully protect against hormone disruption.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-01-16 | 3761-076-1220 | ND |
| 2014-02-03 | 3761-066-1355 | ND |
| 2014-02-03 | 3761-036-1341 | ND |
| 2014-03-07 | 3761-016-1215 | ND |
| 2014-04-04 | 3761-015-0925 | ND |
| 2014-06-09 | 3761-052-1015 | ND |
| 2014-09-03 | 3761-078-1305 | ND |
| 2014-09-03 | 3761-054-0755 | ND |
| 2014-09-03 | 3761-024-0730 | ND |
| 2014-09-26 | 3761-100-1200 | ND |
| 2015-04-21 | 3761-037-1019 | ND |
| 2015-12-09 | 3761-100-1153 | ND |
| 2015-12-09 | 3761-067-1055 | ND |
| 2016-06-20 | 3761-016-1020 | ND |
| 2016-06-20 | 3761-015-1040 | ND |
| 2016-06-20 | 3761-066-0950 | ND |
| 2016-06-21 | 3761-006-0949 | ND |
| 2016-06-21 | 3761-076-0851 | ND |
| 2016-06-21 | 3761-037-0746 | ND |
| 2016-06-21 | 3761-013-0931 | ND |
| 2016-06-22 | 3761-013-0945 | ND |
| 2016-06-22 | 3761-052-0840 | ND |
| 2016-06-22 | 3761-017-1105 | ND |
| 2016-06-22 | 3761-022-0928 | ND |
| 2016-06-22 | 3761-033-1220 | ND |
| 2016-06-22 | 3761-078-1043 | ND |
| 2016-06-22 | 3761-025-1250 | ND |
| 2016-06-23 | 3761-003-0940 | ND |
| 2016-06-23 | 3761-044-1245 | ND |
| 2016-06-23 | 3761-051-1225 | ND |
| 2016-06-23 | 3761-054-1350 | ND |
| 2016-06-23 | 3761-062-1258 | ND |
| 2016-06-23 | 3761-067-1046 | ND |
| 2016-06-29 | 3761-036-1145 | ND |
| 2017-01-25 | 3761-015-1410 | ND |
| 2017-03-02 | 3761-100-0900 | ND |
| 2017-04-12 | 3761-052-1120 | ND |
| 2018-05-08 | 3761-100-0855 | ND |
| 2018-10-22 | 3761-100-1255 | ND |
| 2018-11-14 | 3761-037-1130 | ND |
| 2019-07-17 | 3761-036-1151 | ND |
| 2019-07-17 | 3761-076-1125 | ND |
| 2019-07-17 | 3761-066-1144 | ND |
| 2019-07-17 | 3761-006-1100 | ND |
| 2019-07-17 | 3761-022-1050 | ND |
| 2019-07-17 | 3761-033-1201 | ND |
| 2019-07-17 | 3761-067-1235 | ND |
| 2019-07-17 | 3761-013-1110 | ND |
| 2019-07-18 | 3761-054-1115 | ND |
| 2019-07-18 | 3761-016-0845 | ND |
| 2019-07-18 | 3761-017-0915 | ND |
| 2019-07-18 | 3761-078-1000 | ND |
| 2019-07-18 | 3761-025-1045 | ND |
| 2019-10-16 | 3761-100-1225 | ND |